CharlesLynn opened a new issue, #163:
URL: https://github.com/apache/datasketches-bigquery/issues/163
We're experiencing a consistent issue where datasketches functions in the EU
multi-region work fine at small scale (<100k rows) but hang indefinitely at
larger scale. The same queries against the US deployment (bqutil.datasketches)
complete successfully against billions of rows.
Repro example:
```sql
SELECT
bqutil.datasketches_eu.theta_sketch_agg_string_lgk_seed_p(
some_string_column, STRUCT(14, 9001, 1.0)
)
FROM `project.dataset.large_table`
```
Observations:
- US: completes easily at billion-row scale
- EU: hangs at anything above ~100k rows. Jobs either hit the 6-hour BQ
timeout or are manually cancelled after 13-45+ minutes with no progress
- Both regions use Enterprise edition reservations with sufficient slot
capacity
- No other queries at scale exhibit this behavior in EU — the issue is
specific to datasketches JS UDAFs
- Small-scale EU runs (<100k rows) complete in 2-6 seconds
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